/*
用来指定商品详情的富文本编辑器组件
 */
import React, { Component } from 'react'
import PropTypes from 'prop-types'
import { EditorState, convertToRaw, ContentState } from 'draft-js'
import { Editor } from 'react-draft-wysiwyg'
import draftToHtml from 'draftjs-to-html'
import htmlToDraft from 'html-to-draftjs'
import 'react-draft-wysiwyg/dist/react-draft-wysiwyg.css'

export default class RichTextEditor extends Component {
  static propTypes = {
    detail: PropTypes.string,
  }

  constructor(props) {
    super(props)
    const html = this.props.detail
    if (html) {
      // 如果有值, 根据html格式字符串创建一个对应的编辑对象
      const contentBlock = htmlToDraft(html)
      const contentState = ContentState.createFromBlockArray(contentBlock.contentBlocks)
      const editorState = EditorState.createWithContent(contentState)
      this.state = {
        editorState,
      }
    } else {
      this.state = {
        editorState: EditorState.createEmpty(), // 创建一个没有内容的编辑对象
      }
    }
  }

  /*
  输入过程中实时的回调
   */
  onEditorStateChange = editorState => {
    console.log('onEditorStateChange()')
    this.setState({
      editorState,
    })
  }

  getDetail = () => {
    // 返回输入数据对应的html格式的文本
    return draftToHtml(convertToRaw(this.state.editorState.getCurrentContent()))
  }

  uploadImageCallBack = file => {
    return new Promise((resolve, reject) => {
      const xhr = new XMLHttpRequest()
      xhr.open('POST', '/manage/img/upload')
      const data = new FormData()
      data.append('image', file)
      xhr.send(data)
      xhr.addEventListener('load', () => {
        const response = JSON.parse(xhr.responseText)
        const url = response.data.url // 得到图片的url
        resolve({ data: { link: url } })
      })
      xhr.addEventListener('error', () => {
        const error = JSON.parse(xhr.responseText)
        reject(error)
      })
    })
  }

  render() {
    const { editorState } = this.state
    return (
      <Editor
        editorState={editorState}
        editorStyle={{ border: '1px solid black', minHeight: 200, paddingLeft: 10 }}
        onEditorStateChange={this.onEditorStateChange}
        toolbar={{
          image: { uploadCallback: this.uploadImageCallBack, alt: { present: true, mandatory: true } },
        }}
      />
    )
  }
}
